It is if we assign that extreme view to the person, but if not, it's a great thought experiment to examine their viewpoint. If one incest baby born to a 10-year-old is okay to stop 30,000 abortions, but 30,000 incest babies to stop one abortion is unacceptable, then there's a threshold in the middle somewhere.

Where's the line? What's the ratio of incest babies-to-abortions at which it crosses over from acceptable to not?